n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 10 |
5 | 25 |
6 | 71 |
7 | 196 |
8 | 554 |
9 | 1569 |
10 | 4477 |
11 | 12826 |
12 | 36895 |
13 | 106470 |
14 | 308114 |
15 | 893803 |
16 | 2598314 |
17 | 7567465 |
18 | 22076405 |
19 | 64498426 |
20 | 188689685 |
21 | 552675364 |
22 | 1620567764 |
23 | 4756614061 |
24 | 13974168191 |
25 | 41088418150 |
26 | 120906613076 |
27 | 356035078101 |
28 | 1049120176954 |
[1,0,2,3,10,25,71,196,554,1569,4477,12826,36895, 106470,308114,893803,2598314,7567465,22076405, 64498426,188689685,552675364,1620567764, 4756614061,13974168191,41088418150,120906613076, 356035078101,1049120176954] |